Chicago-latrobe 42625 Jobber Drill Bit 25/64 in Hss Tialn

Product Description

The CHICAGO-LATROBE 42625 is a jobber-length drill bit engineered for high-performance drilling in demanding materials, including titanium. Built from high speed steel with a TiAlN coating, this bit delivers extended tool life and heat resistance under aggressive cutting conditions. The 135-degree split point reduces walking and lowers thrust requirements at entry, making it a reliable choice for precision hole-starting without a center punch. With an overall length of 5.125 inches and a regular spiral flute design, the 42625 is suited for use in production drilling environments where consistency and tool longevity matter. Licensed machinists, tool-and-die technicians, and trade professionals working with hard or exotic metals are the primary users of this bit.

The 42625 is designed for drilling titanium and similarly hard workpiece materials where standard HSS bits fall short. The TiAlN coating reduces friction and thermal buildup at the cutting edge, extending service intervals in production runs. Its straight-cylindrical shank accommodates standard drill chucks and collet holders across a wide range of drill presses, CNC machining centers, and handheld drilling equipment. The web-thinned, tapered web configuration reduces cutting resistance at depth, which is especially important when running through thick-section titanium or stacked materials. This bit conforms to NAS 907 Type B standards, making it appropriate for aerospace and precision manufacturing applications.

Key Features

• TiAlN coating provides heat and wear resistance for extended tool life in hard materials
• 135-degree split point reduces thrust and prevents walking at drill entry
• Web-thinned tapered web lowers cutting resistance through full depth of cut
• Right-hand spiral flute with regular helix promotes efficient chip evacuation
• Meets NAS 907 Type B specification for aerospace-grade dimensional and performance standards
• Heavy-duty grade construction rated for high-performance drilling applications

Compatibility

Primary workpiece material is titanium per specification NAS 907 Type B. The straight-cylindrical shank fits standard drill chucks and collet systems designed for 25/64-inch or equivalent decimal shank sizes across drill presses, CNC machines, and handheld drilling tools.

Installation Notes

This bit is installed and used by machinists, toolroom technicians, and trade professionals operating drilling equipment. Secure the straight-cylindrical shank fully in the chuck or collet before operation and verify runout is within acceptable limits for precision work. Always match spindle speed and feed rate to the workpiece material and consult cutting data tables for titanium applications. Inspect the cutting edge and TiAlN coating for wear or chipping before each use and replace the bit when diameter tolerance or point geometry is no longer within spec.